Traversing hoists – Closure remover
Patent
1990-02-07
1991-07-30
Basinger, Sherman D.
Traversing hoists
Closure remover
212162, 2121421, B66C 2318
Patent
active
050353365
ABSTRACT:
A manually actuated, hydraulic manhole cover lifter (10) comprises a frame (12) mounted on wheels (58) and adapted to straddle a manhole. An actuator (30) is mounted on the frame. The actuator comprises a cylinder (36) connected to a pump (34). A magnet (50) is connected to the cylinder (36) for engagement with the metallic manhole cover. In a second embodiment, the lifter (70) includes pivotal legs (74) in order to be more compact for storage and transport. A winch (108) can be utilized instead of a pump and cylinder arrangement (34, 36), and the manhole cover can be engaged either mechanically or magnetically.
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Quam Dean R.
Schmitz Robert J.
Avila Stephen P.
Basinger Sherman D.
Bunch John W.
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